Testing instrument



FIG. 1 is a front, right-side, top perspective view of the testingdevice of the design according to a second embodiment;

FIG. 2 is a rear, left-side, top perspective view of thereof;

FIG. 3 is a partial front elevational view thereof;

FIG. 4 is a partial rear elevational view thereof;

FIG. 5 is a partial top plan view thereof;

FIG. 6 is an enlargement of area 6 in FIG. 1; and,

FIG. 7 is an enlargement of area 7 in FIG. 2.

The broken lines depict either (i) enlargement areas that form no partof the claimed design, or (ii) parts of the testing device that form nopart of the claimed design.

CLAIM The ornamental design for a testing instrument, as shown and described. 